Photographic-plate holder



Patented Feb. 28, |899.

G. C. STANLEY.

PHOTOGRAPHIE PLATE HOLDER.

(Application lod Oct. 11, 1898.)

(Nn Model.)

Vea.

we Nonms Pinzas co., mmauwc., mswmsmn, n. cA

UNITED STATESl PATENT OFFICE.

GEORGE O. STANLEY, OF ITHACA, NEW YORK.

PHOTOGRAPHlC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 620,373, dated February28, 1899.

Application tiled October 11,1898. Serial No. 693,234. (No model.)

To all whom t may concern:

Be it known that I, GEORGE C. STANLEY, a citizen of the United States,residing at Ithaca, in the county of Tompkins and State of New York,have invented certain new and useful Improvements in Photographic-PlateHolders; and I do declare the following to be a full, clear, andl exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. l

My invention relates to improvements in photographic-plate holders, andmore particularly to the means employed to secure the sensitized platein the holder; and the object is to provide a simple and efficientdevice for this purpose.

The invention consists in certain features of construction andcombination of parts, which will be hereinafter fully described, andparticularly pointed out in the appended claims.

Similar reference characters indicate like parts of the device in theseveral views.

Figure 1 is a front elevation, partly in section, of a doubleplate-holder embodying my invention. Fig. 2 is a vertical transversesection on the broken line 2 2 of Fig. 1. Fig. 3 is a similar view onthe broken line 3 3 of Fig. l.

1 denotes the holder-frame, and 2 the slide, which is provided with theusual iingergrip 3.

4 denotes a locking-bolt snugly iitting an orifice in the frame topermit of an axial and a longitudinal movement therein, and the outerend of said bolt 4 terminates in a lateral arm 5, which is adapted to beturned across the slide-grip 3 to lock it in the holder and also to beturned parallel with said grip to release it when it is desired towithdraw it. A spiral spring 6 encompasses the projecting end of saidbolt 4between the arm and the contiguous face of the frame to act as afriction-brake for said bolt to retain it in the position to which ithas been placed, and thereby prevent its accidental displacement. Theinnerend of said bolt is formed with an annular groove 7 to receive thebifurcated end of the shorter arm of the lever 8, fulcrumed on the screw9, fixed in the frame. The longer arm of this lever 8 is pivoted t0 ashort rod 10, extending through a transverse opaque partition '12, iixedin the frame, and the inner end of said rod 10 is iixed to a bar13,which has a limited movement parallel with the partition 12.

14 14 designate semi-elliptical springs interposed between the partitionand the bar 13, the tension being exerted to press the bar inwardly andaway from the partition. The inner edge of the bar 13 is formed with alongitudinal groove 15 to receive the contiguous edge of the sensitizedplate 16.

The operation of the device is as follows The lateral arm 5 of the bolt4 is turned parallel with the slide-grip 3, which permits the slide tobe withdrawn in the usual manner. The sensitive plate is now inserted byfirst placing its lower end in the usual rabbeted recess in the butt-endof the holder, so that the upper end of the plate will lie against theoutside face of the bar 13, the holder being tilted to accomplish this.The bolt 4 is now forced inward, which, through the medium of thelever/S, withdraws the bar 13 from the path of the plate, which nowdrops in line with the groove 15, and upon releasing the bolt 4 thesprings 14 14 force the bar 13 inward, so as to encompass the contiguousedge of the plate and securely retain it in the holder. The slide is nowinserted and the bolt 4 turned on its axis, so that its arm 5 willextend across the outer edge of the slide-grip 3 and prevent itsaccidental withdrawal. At the same time the slide grip 3 acts as abarrier to the bolt 4 to prevent its being accidentally moved inwardly,and thereby release the plate. After the plate has been exposed in thecamera the bolt 4 is turned so that its arm 5 releases the slide-grip,and after the slide is withdrawn the holder is tilted with the platedown and the bolt 4 pressed inward, which withdraws the bar 13 fromengagement with the upper edge of the sensitized plate, therebypermitting the plate to fall outwardly from the holder and into the handplaced to receive it.

While I have only described the means for retaining one platev andlocking one slide in place, it will of course be understood that in ICOa double plate-holder such as I have shown the same parts are duplicatedfor the other side of the holder.

The accompanying drawings show my invention in the best form noW knownto me; but many changes in the details might be made Within the skill ofa good mechanic Without departing from the spirit of my invention as setforth in the claims at the end of this speciiication.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. In combination With a photographic-plate holder, the grooved bar 13,the lever Shaving one arm connected to said bar, the bolt 4 conneeted tothe opposite arm of said lever, and having its projecting end formedwith a lateral arm 5, substantially as speciiied.

2. In combination, the plate-holder, provided With a slide, the bolt 4formed with a lateral arm 5 adapted to extend across the path of saidSlide, the grooved bar 13, and the lever 8 operatively connecting saidbolt and bar, substantially as shown and described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit- DGSSGS.

GEORGE C. STANLEY. Vitnesses:

DOW S. BARNES, LEROY II. VAN KIRKA

